The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2012
Filed:
Dec. 04, 2006
Dong-seung Kwon, Daejeon, KR;
Young-seog Song, Daejeon, KR;
Seung-joon Lee, Daejeon, KR;
Jong-ee OH, Daejeon, KR;
Chungyong Lee, Daejeon, KR;
Myeong-cheol Shin, Daejeon, KR;
Dong-Seung Kwon, Daejeon, KR;
Young-Seog Song, Daejeon, KR;
Seung-Joon Lee, Daejeon, KR;
Jong-Ee Oh, Daejeon, KR;
Chungyong Lee, Daejeon, KR;
Myeong-Cheol Shin, Daejeon, KR;
Abstract
Respective codewords of quantization codebooks corresponding to a number of data streams are selected based on channel information estimated by a received training symbol. A stream mode is selected among stream modes to determine a modulation method applied to each data stream. The data stream is detected by using the codeword corresponding to the quantization codebook of the data stream corresponding to the selected stream mode as a precode matrix, and the detected data stream is modulated. In this case, a receiving apparatus performs a feedback operation so that indexes of the selected stream mode and the codeword used as the precode matrix may be transmitted to the transmitting apparatus. The transmitting apparatus selects the number of transmitted data streams and the modulation method based on the transmitted index of feedback streams by the feedback operation.